Car-brake



(No Model.)

W. H. MASTERMAN.

3 CAR BRAKE. No. 333,874. Pate nted Jan. 6, 1886.

N. PETERS, FhaioLilhngnpher, Wzahinglam 0.0.

, for a more complete explanation of my inven- UNITED STATES PATENT OFFICE;

l Ll WILLIAM H. MASTERMAN, OF NEWARK, ASSIGNOR OF ONE-SIXTH TO ALFORD H. WALKER, 'OF OAKLAND, CALIFORNIA.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 333,874, dated January 5,1886.

Application filed October :1, 1885. Serial No. 180,543, (No model.)

has a weight, L, supported upon it. A forked arm, M, has its two sides extending down upon each side of the weight L, and a pin, N, passes through the arms M and the weight, thus uniting them together. The sides of the weight are beveled, so as to form a shoulder, as shown at 0, so that when the weight is at its lowest point and in its normal position the ends of the arms M rest upon the shoulders, as shown in Fig. 2. The upper ends of these arms M are brought together, and have an eye or opening, 1?, which is fitted to slide upon a rod, Q, permanently secured to the truck-frame or some other convenient point. While the weight is down the position of the arms M, resting upon the angular shoulders O, is such that the eye P will slide freely upon the bar Q. When power is applied to the To all whom it may concern.-

Be it known that 1, WILLIAM H. MAsrEn- MAN, of Newark, Alameda county, State of California, have invented an Improvement in Automatic Brake-Equalizers; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to a device for regulating or equalizing the pressure of'brakethe wheels of cars, by which the pressure is prevented from becoming so excessive as to entirely stop the wheels, and thus ruin them from wearing them flat in spots.

It consists of a bellcrank lever pivoted to the upper end of the brake-lever, having one arm connected with the rod by which power is applied and the other carrying a weight, which allows pressure to be applied to the brake to a certain point, when this weight will rise. By means of an arm connected with it and provided with an eye, which slides upon a stationary rod, a further movement of the brake is checked by the binding of this eye upon the rod.

Referring to the accompanying drawings upper end of the lever E, and through it apply the brakes G C to the wheels. A continued increase of the power applied to the rod J will act upon the lever H in such a way as to raise the outer end of the lever, and with it the weight L, and as this weight rises it also raises the arms M, so that they turn about the pivot-pin N, and thus turn the eye 1? to such an angle with the rod Q that it binds thereon, and thus prevents being drawn any farther forward. The weight L is adjusted upon the lever H at such apoint that all the power can be applied to the brakes that-will be necessary, just short of what would cause the wheels to slip, after which any further application of power to the rod J will raise the lever, arm M, and the weight, and thus cause the eye P to bind upon the stationary rod Q. The weight L is preferably slotted longitudinally, as shown at B, so that the rod J may work freely through the slot.

It will be manifest that the mechanism may be varied to suit different applications of brakes which work in different positions from those here shown, as in the case of air-brakes, in which a central cylinder operates the brakes at each end of the car. Two of these devices may then be introduced one for each truck.

Having thus described my invention, whatl claim as new, and desire to secure by Letters Patent, is-

1. The brake-lever and the rod througl 1 is a side elevation of a fourwheeled truck, showing the application of my invention. Fig. 2 is an enlarged side view of the block and its connected arm, with the eye and the rod upon which it slides. Fig. 3 is an end view of the same.

A A are the wheels of a car-truck, which I have shown in the present case for the purpose of illustrating my invention.

B is the truck-frame, which may be in the usual or any suitable form.

C O are brake-shoes suspended by links D, so that they may swing to and from the wheels, and E is the lever, having one end connected by a rod, F, with the brake-bar upon the opposite side, the lever itself being fulcrumed at G to the brake-bar nearest to it. The upper or long arm of the lever has a lever, H, pivoted to it, as shown at I, and the rod J, by which power is applied to the lever E, and through it to the brakes, is connected with the lever H. at a point, K, just below and out of horizontal line with the pivot I. The lever H extends forward a considerable distance, and

tion, Figure the lever E from 1 hich powenis applied thereto, in combinaprovided with an eye formed at its upper end, so as to slide upon the fixed rod or bar when rod when the weight is raised, substantially 15 as herein described.

In witness whereofI have hereunto set my hand.

XVILLIAM H. MASTERMAN. WVitnesses:

S. H. NoURsE, H. 0. LEE. 

